DS1809Z-100

Digital Potentiometers Overview

The DS1809Z-100+ is a nonvolatile digitally controlled potentiometer (Dallastat) from Analog Devices/Maxim Integrated, housed in an 8-lead SO package. It provides 64 uniform linear wiper positions across a 100 kΩ resistor range, including end terminals. Operating on +4.5V to +5.5V supplies with a typical active current of 1 mA, it features a contact-closure interface for pushbutton or CPU control. The device retains wiper position via internal EEPROM (>50k writes) using autostore or command-initiated methods. Key electrical parameters include ±20% resistance tolerance, 750 ppm/°C temperature coefficient, and operation within -40°C to +85°C.

Digital Potentiometers Feature Summary

• Nonvolatile memory maintains wiper position during power loss via EEPROM (>50k write cycles).
• Contact-closure interface supports simple pushbuttons or CPU signals without external debounce circuitry.
• Provides 64-position linear taper over the full 100 kΩ resistor range.
• Low-power design suitable for portable applications, operating at +4.5V to +5.5V.

Digital Potentiometers Applications

• Battery-powered portable devices requiring low standby current.
• Audio volume or tone control systems utilizing pushbutton interfaces.
• Industrial equipment needing durable replacements for mechanical potentiometers.
• Calibration circuits where nonvolatile setting retention is critical.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'Z' corresponds to the 8-lead SO package when sourcing. Confirm RoHS compliance status indicated by the '+' suffix. Ensure supply voltage remains strictly within the 4.5V to 5.5V range to prevent damage. Check for availability constraints as distribution channels may vary by region.

Digital Potentiometers Selection Notes

Select the DS1809Z-100+ specifically for its 100 kΩ resistance value; other variants like DS1809Z-010+ offer 10 kΩ. Choose the 'Z' suffix for surface-mount SO packaging versus 'U' for µSOP or no suffix for PDIP. Consider the 750 ppm/°C temperature coefficient for precision requirements. Verify that the 64-tap resolution meets the application's adjustment granularity needs.

Digital Potentiometers Part Context

This component belongs to the DS1809 Dallastat family of nonvolatile digital potentiometers. It serves as a solid-state alternative to mechanical pots, eliminating wear issues associated with moving parts. The series includes variations in resistance values (10k, 50k, 100k) and packages (PDIP, SO, µSOP), all sharing the same core 64-position nonvolatile architecture.

Digital Potentiometers Replacement Considerations

Direct pin-compatible substitutes within the same family include DS1809U-100+ (µSOP package) or DS1809-100+ (PDIP package). Ensure any replacement maintains the 100 kΩ resistance and 64-tap specification. Verify that the new package type fits the PCB footprint if changing from SO to another form factor.